IPtables SNAT eats packetsSomething is definitely going wrong, as I cannot see the packets at the destination. Whereas if I remove the rules, I can see them at the destination. I have also tried moving the rule above the other SNAT rule, but this doesn't make a difference.

IPtables SNAT eats packetsThere are quite a lot of rules in iptables, most not related to this, but I can post them if it will help. However, looking at the iptables flowchart, isn't nat/POSTROUTING the last table/chain to process a packet destined for another host?